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When trying to use the key @ which should be Shift + 2 I get " When trying to type " which is near the enter button with a comma below its typing @ and I cannot type a comma, How can I fix these keys? Kindly Dianne Its occuring on my laptop an acer ASPIRE as well as a notebook.

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  • JDTec
    JDTec Mar 31, 2011

    Did you spill something on the Keyboard? Is the Keyboard dirty? Since the @ and # are next to each other on the numbers keys, that leads me to think that some thing is shorting the two keys. Buy a can of compressed air and blow under the keys(if it is dirt or dust that is causing this) If something has spilled on it, then it may need to be clean by a tech.

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It seems that you have a UK keyboard layout.
To change your keyboard layout to a US keyboard layout follow the instructions in this site: How to change keyboard language in Windows
Hope this helps.

Posted on Mar 31, 2011

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1 Answer

How do I type a comma


Put your finger right below the 'K' and 'L' buttons on the keyboard. If you have 'Shift' held down, you'll get '<,' but if not, the comma you've been seeking should appear.

If not, reinstall your drivers, then turn it off and back on again.

Aug 30, 2012 | Office Equipment & Supplies

1 Answer

How to calculate integration in fx-991ms


Syntax is $( function,lower bound,upper bound) =
Press the Integral key. $(
Type in the function eg. sin
Type the variable: SHIFT ) to enter X
Type in a comma separator ,
Type in the lower bound of the integral
Type in a comma separator ,
Type in the upper bound
Close the right parenthesis )
Press = to get the result.
Note: You have to wait for the calculator to return with the answer. Some calculations may require time to perfor.

Jan 11, 2012 | Casio Office Equipment & Supplies

1 Answer

I want to know how to calculate derivative of functions like sinx, logcosx, e^X etc on my calculator


Here it is

The syntax of the command is
4aa123f.jpg
where function is the expression you are differentiating
x is the value of variable x at which you are evaluating the derivative, and tol is the tolerance (the error) you are willing to tolerate in the result.

If you do not want to specify a tolerance just omit the last comma and tol.

To enter the command d/dx you use key sequence [SHIFT][Integral]
To enter the symbol x in the expression you press [ALPHA][ ) ]
To enter a comma you use [SHIFT] [ ) ]
To enter a power of 10 in the tolerance use [x10^X] key

Example : Calculate
18c49ac.jpg
The key sequence is as follows
[SHIFT] [Integral] 3 [ALPHA] [ ) ] [X^2] [-] 5 [ALPHA] [ ) ] +2 [SHIFT] [ ) ] 2 [SHIFT] [ ) ] 1 [x10^X] [(-)] 12 ) [=]

DO NOT confuse [SHIFT] [ ) ] which enters the comma and [ALPHA] [ ) ] which enters the variable X.

k24674_76.jpg


Jun 29, 2011 | Casio FX-115ES Scientific Calculator

2 Answers

Hi there. I'm using Casio FX-570ES scientific calculator. I would be glad if you could guide me as to how to obtain derivative of a polynomial expression e.g. y=12(x^2+6)^5


Here is an example. Instead of SIN(X) insert your polynomials.

The syntax of the command is
4aa123f.jpg
where function is the expression you are differentiating
x is the value of variable x at which you are evaluating the derivative, and tol is the tolerance (the error) you are willing to tolerate in the result.

If you do not want to specify a tolerance just omit the last comma and tol.

To enter the command d/dx you use key sequence [SHIFT][Integral]
To enter the symbol x in the expression you press [ALPHA][ ) ]
To enter a comma you use [SHIFT] [ ) ]
To enter a power of 10 in the tolerance use [x10^X] key

Example : Calculate
18c49ac.jpg
The key sequence is as follows
[SHIFT] [Integral] 3 [ALPHA] [ ) ] [X^2] [-] 5 [ALPHA] [ ) ] +2 [SHIFT] [ ) ] 2 [SHIFT] [ ) ] 1 [x10^X] [(-)] 12 ) [=]

DO NOT confuse [SHIFT] [ ) ] which enters the comma and [ALPHA] [ ) ] which enters the variable X.

k24674_76.jpg

May 28, 2011 | Casio FX-115ES Scientific Calculator

2 Answers

I want to calculate powers on my calculator but am unsure what buttons to press


You have two buttons to calculate powers: The [x^2] calculates the square of a number while the [caret ^] key allows you to calculate any power, be it with integer, fraction or negative exponent.
Both keys are next to one another, one below OPTN and the other below the VARS key.
To calculate roots, you have the square root [SHIFT][x^2] the xroot key [SHIFT] [caret ^] , the CUBE root [SHIFT] [(] , and the inverse key [SHIFT][).

Feb 28, 2011 | Casio FX9750GII Graphic Calculator

1 Answer

How to find derivatives using fx115-es


The syntax of the command is
4aa123f.jpg
where function is the expression you are differentiating
x is the value of variable x at which you are evaluating the derivative, and tol is the tolerance (the error) you are willing to tolerate in the result.

If you do not want to specify a tolerance just omit the last comma and tol.

To enter the command d/dx you use key sequence [SHIFT][Integral]
To enter the symbol x in the expression you press [ALPHA][ ) ]
To enter a comma you use [SHIFT] [ ) ]
To enter a power of 10 in the tolerance use [x10^X] key

Example : Calculate
18c49ac.jpg
The key sequence is as follows
[SHIFT] [Integral] 3 [ALPHA] [ ) ] [X^2] [-] 5 [ALPHA] [ ) ] +2 [SHIFT] [ ) ] 2 [SHIFT] [ ) ] 1 [x10^X] [(-)] 12 ) [=]

DO NOT confuse [SHIFT] [ ) ] which enters the comma and [ALPHA] [ ) ] which enters the variable X

Oct 29, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

I have to use eng mode. When I type (54.2*10ee-3)*(37*10ee9) I get 2.0054ee11. My teacher says that I should have 2.0054ee3. Does my calculator is broken?


No! Your calculator is not broken. However you are not using the EE button correctly, or you are not aware of its meaning.
The EE key is a shortcut for 10 to a power and the 10 is already included.

Here is an example.To enter the [EE] you use [SHIF][,] where the comma [,] is the key between [SIN] and [7] in the column under [MODE]. To enter a negative exponent you use the change sign key (-), the one at the bottom of keypad below 3 and to the right of the decimal mark [.]
To enter 54.2 x10^(-3) you type in 54.2[,] [(-)]3
To enter 37x10^(9) you type in 37[SHIFT] [,]]9

The correct result is 2.0054x10^9 and your calculator will show you 2.0054E9

However by typing in 54.2*10[EE]-3 your are in fact entering 54.2x10x10^(-3) and by typing 37*10[EE]9 you are entering 37*10*10^9 and your final result is in fact multiplied by 100, hence the value you are getting 2.0054E11

Aug 29, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

Im not sure on how to caculate derivatives on the calculator, help would be appreciated


The syntax of the command is
4aa123f.jpg
where function is the expression you are differentiating
x is the value of variable x at which you are evaluating the derivative, and tol is the tolerance (the error) you are willing to tolerate in the result.

If you do not want to specify a tolerance just the last comma and tol.

To enter the command d/dx you use key sequence [SHIFT][Integral]
To enter the symbol x in the expression you press [ALPHA][ ) ]
To enter a comma you use [SHIFT] [ ) ]
To enter a power of 10 in the tolerance use [x10^X] key

Example : Calculate
18c49ac.jpg
The key sequence is as follows
[SHIFT] [Integral] 3 [ALPHA] [ ) ] [X^2] [-] 5 [ALPHA] [ ) ] +2 [SHIFT] [ ) ] 2 [SHIFT] [ ) ] 1 [x10^X] [(-)] 12 ) [=]

DO NOT confuse [SHIFT] [ ) ] which enters the comma and [ALPHA] [ ) ] which enters the variable X

Aug 27, 2010 | Casio FX-115ES Scientific Calculator

2 Answers

Can i calculate calculus using fx-991ms


If you want to get an answer like 1/2X for d/dx(X^2), you will have to purchase a CAS calculator like Casio's Algebra FX-2 or Classpad. TI series calculators also have CAS.
However, you can calculate the numerical values of derivatives and integrals only.
To calculate the value of a proper integral:

  1. Press the 'ON' key;
  2. Press the Integral key b8325f5.jpg;
  3. Enter your expression (example X^2+X-3 etc);
  4. Press the 'comma' key after your expression;
  5. Input the first limit after comma, input comma again after first limit;
  6. Close brackets;
  7. Press the equals key, display may return after a while with the answer.
for eg to calculate xdx from 0 to 2, input as follows:

dx(X,0,2)

To calculate derivative at a point:

  1. Press Shift and then the integration key.
  2. Enter your function;
  3. Input comma;
  4. input the point at which you want to evaluate the derivative;
  5. Close bracket and press enter.
Example, to calculate d/dx X^2 at 3 input:

SHIFT+dx key X^2,3)

Display looks like this: d/dx(X^2,3).


Oct 23, 2009 | Casio FX-300MS Calculator

2 Answers

The@sign


I had the same problem. When I pressed shift and that comma key I got a " instead of a @.

I looked to see what on the leyboard you normally press to get a " and that's the number 2 key.

Tried pressing shift and the 2 key and hey presto, I got a @.

So it looks like @ and " have swapped places.

So shift and 2 for a @!

Lizzie H

Oct 24, 2008 | Computers & Internet

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